I live only a kilometre from Lake Ontario, and benefit from the mild weather that results from this proximity. Even now at the end of November we have experienced only a few light frosts and can still enjoy the last few flowers that survive the cold nights.
The roses are the most dogged survivors and despite the fact that they have lost much of their foliage, they continue to bloom.
It is only a question of time, of course, and winter will take hold and force these hold outs into dormancy. In the meantime we are enjoying these last precious blooms.